I'm trying to install the Parallels Tools on Ubuntu 20.04, but it fails. In the log, I see this error: Code: Start installation or upgrade of Guest Tools ERROR: Kernel configuration is invalid. include/generated/autoconf.h or include/config/auto.conf are missing. Run 'make oldconfig && make prepare' on kernel src to fix it. make: *** [Makefile:746: include/config/auto.conf] Error 1 make: *** [/usr/lib/parallels-tools/kmods/prl_eth/pvmnet/Makefile.v26:11: all] Error 2 make: *** [Makefile.kmods:49: compile] Error 2 Error: could not build kernel modules Error during report about failed installation of parallels tools. Error: failed to install Parallels Guest Tools! I'm just using the default image of 20.04 from Ubuntu's website, I didn't compile my own kernel. I have installed the linux headers for my kernel version (5.11) with Code: sudo apt install linux-headers-$(uname -r) After I got this error, I tried installing the generic headers and rebooting, but I still got the same error again. I'm not sure what else this error means. Is there actually something wrong with my configuration, or does Parallels not support this kernel? If not, which version of Ubuntu should I downgrade to?